What is the most stable os for 9900

Hi. I need help on my 9900 from t.mobile, I upgraded to 7.0.0.540. There were no issues for 2 weeks, I recently started experiencing freezes and the phone is slow. I need advice on which os is more stable. Thanks!

I have tried every OS for the 9900 and everytime I end up wiping my device and installing 7.0.0.503
It has the best Radio quality (reception signal strength) + battery life!
Try it, and you'll never feel the need to upgrade anymore!

Thanks all

Thanks guys for your contribution. Although different people think different Os are the most stable based on their experience. Ill just download 7.0.0.353 cos so far I have seen with the best reviews. Let's see how it goes.

Thanks guys for your contribution. Although different people think different Os are the most stable based on their experience. Ill just download 7.0.0.353 cos so far I have seen with the best reviews. Let's see how it goes.